Study on host preference of Thrips hawaiiensis for different ornamental plants

Thrips hawaiiensis is a common thrips pest that damages the flowers of various plants. The differing population sizes of T. hawaiiensis among host plants suggest its…

CAN: Horticulture disinfectant receives fungicide approval

A disinfectant in the agriculture, horticulture, and greenhouse industries, KleenGrow, has received its designation as a fungicide from Health Canada. Manufactured and…

AHDB

AHDB:

Control of rust diseases on protected ornamentals

Rust diseases affect several popular species of bedding plants, including antirrhinum, bellis, cineraria, dianthus, fuchsia, pelargonium and sweet william, and pot plants such as campanula, chrysanthemum and pot roses. Disease impact varies, but crop losses of 2–5% are not uncommon and total loss is…

Managing whiteflies on poinsettias using biological control agents

Recent research shows the use of biological controls, along with scouting, can be an important part of a grower’s whitefly management program. Whiteflies are a common annual…

China: Plant epidemic prevention and control at the Flower Expo Shanghai

The Flower Expo has finally opened. Since last year, Shanghai Customs has taken multiple measures to ensure the smooth holding of this Expo and smart quarantining will build a…

CAN: New invasive insect pests of ornamentals – box tree moth

Last week, the Canadian Food Inspection Agency (CFIA) had confirmed the presence of box tree moth (Cydalima perspectalis) in a St. Catharines, Ontario, Canada nursery. On May…

NL: Fikona on the organic tour

After a period of many tests and with the help of an external cultivation advisor, Fikona Nursery in Lier, Belgium, has now succeeded in treating the plants in two departments entirely organically. The organic way Although Fikona had been making the transition to more organic cultivation for some time, it was still necessary to…

Cover for all new and existing water silos

"If you were to take a tour of the greenhouses in the Netherlands you would see that not every water silo is well maintained. Sometimes there are even plants growing above the silo, which has consequences for the water quality and must be prevented," says Kees Ooms, director of Buwatec. He believes that…

UK: Fees introduced for import of EU high-priority goods and update to Defra's PEACH system

Fees and charging for plant health controls (documentary, identity and physical checks) on imports of EU high-priority plants and plant products was introduced earlier this week on 1 June 2021 in England, Wales and Scotland. From 1 June 2021 all PEACH applications for a category of plants and plant…

BASF

US (NC): BASF introduces new broad-spectrum fungicide for the greenhouse and nursery market

BASF has introduced Avelyo fungicide for the greenhouse and nursery market. Avelyo fungicide is powered by the active ingredient mefentrifluconazole, providing commercial growers with broad-spectrum protection from difficult diseases with plant safety.  Avelyo fungicide provides control of key diseases including…

New technology for proven whitefly & thrips control

The control of pests using BioControl Agents is good news for the environment due to the consequential reduction in the number of conventional pesticide sprays required and is practiced throughout the world with extremely successful results. Changes in pest pressure require adaptations of beneficials too…

US closes border to Canadian exports of boxwood, euonymus, and holly

Effective immediately, the United States Department of Agriculture's Animal and Plant Health Inspection Service (APHIS) is amending entry requirements for the importation of…

Aphidoletes-System: "as efficient as it is effective at controlling aphids"

The fight against aphids is in full swing again. If growers had to choose one control agent they would not want to be without, most would select Aphidoletes-System. While displaying excellent searching behavior, this gall midge plays a key role minimizes hotspots from developing. About 3mm in size and…

New, ‘broad’ type of resistance against insects found in plants

Researchers at Wageningen University & Research (WUR) and KeyGene in the Netherlands and Umeå University in Sweden have discovered that a resistance gene in thale cress (Arabidopsis thaliana) that is active against the green peach aphid also affects several other aphids and some whiteflies. That is…

Entonem keeps young orchids free from Sciara

Entonem is an excellent product for combating soil-dwelling pests. Floricultura uses it to tackle Sciara and thrips pupae with very good results.  Floricultura is a big name in the international orchid market. The company produces young plants of the Phalaenopsis, Cymbidium, Cambria, and Miltonia varieties.…

Royal Brinkman gives practical tips for hygiene in African cutting companies

"It is increasingly important to keep the levels of hygiene as high as possible"

Hygiene specialists Jasper Verhoeven and Dirk Timmers share their knowledge about the importance of hygiene in greenhouse companies, also presenting practical tips. They are part of Royal Brinkman and HortiHygienz, which launched three years ago to take a broader look at horticultural hygiene and…

UK: "Get ready to target vine weevil eggs"

With vine weevil adults soon to emerge and start egg-laying, now is the time for UK growers to plan ahead to apply the biorational Pitcher GR, says ICL’s Sales Development Manager Martin Donnelly. “This year the vine weevil’s annual life cycle has been delayed a little due to the cold weather,” he says.…

Energy-saving success during the rearing of natural enemies

The Energy and Water Sustainability Focus Group of Koppert is hard at work prioritizing and reducing Koppert’s consumption of natural gas, other fossil fuels and electricity. This includes using a green label greenhouse with sustainable technologies such as heat-saving screens and heat pumps. One…

Photo: Matthew Bertone

6 common greenhouse pests and how to manage them

Pest and disease outbreaks in a greenhouse are a serious pain and can get out of hand if they aren’t addressed properly. Pest and disease outbreaks in a greenhouse usually require three main factors: a susceptible host plant, the presence of a pest or disease, and the right environment for it to…

New broad type of resistance against insects found in plants

Identifying the genetic code for disease resistance in plants is normally a tricky thing. A single gene can usually only offer protection against a specific disease or parasite. But this time it’s different. Researchers at Wageningen University & Research have discovered that a resistance gene in thale…

Angela Madeiras

UMass Extension Plant Diagnostic Lab

PGR impacts on New Guinea Impatiens

Two New Guinea Impatiens were recently submitted to the UMass Extension Plant Diagnostic Lab. While the growth of one plant appeared normal, the second had significantly shortened internodes, tight, bunchy growth, and leaves of diminished size. The plant appeared otherwise healthy. Suspected causes were…

UK: Tackling Japanese flower thrips in protected ornamental and herb crops

Japanese flower thrips has been confirmed in the UK. Wayne Brough, Knowledge Exchange Manager Horticulture, tells AHDB how lessons from the Netherlands may provide answers on…

India: Study conducted on important virus disease infecting the Anthurium plant

Ornamental Anthurium is one the main cut flower in domestic market in Iran. Approximately, 5000 hectares (land and screen-houses) are under ornamental cultivation in Iran and…

How do nematodes help plants and soils?

Nematodes normally get a bad reputation. Indeed, some of these minuscule creatures can cause harm in plants and animals. But little is known about the non-parasitic nematodes,…

Molecular characterization of rose spring dwarf-associated virus isolated from China rose

China rose is an important ornamental plant grown widely in China. In May 2019, the Chinese Academy of Agricultural Sciences sampled and analyzed a China rose plant by…

Canada: Local gardening center adopts fire-resistant plant tagging program

Art Knapp Prince George is one of the first garden centers in British Columbia to launch the FireSmart BC Landscaping Guide and fire-resistant plant tagging program.The center…

Greater ventilation and safe production with insect screens

Invasive biology of Thrips (Thripidae) has recently increased their importance as agricultural pests of ornamental plants, vegetables, and fruit crops globally. They successfully invaded many countries bringing damages on fields, plantations and greenhouse crops. Its invasiveness is mostly attributed to…

June 2 - March 10

Boxwood blight webinar series announced

The Boxwood Blight Insight Group (BBIG) has announced a webinar series that teaches attendees about growing and protecting boxwood. Registration for all webinars is…

Maximum management of harmful nematodes with Tagetes ‘Ground Control’

Tagetes patula ‘Ground Control’ was specially developed by Takii for growers who want to suppress harmful lesion nematodes in the most efficient, cost-effective and…

Firefly: A bug early warning system/precision crop health monitor

Automated detection of harmful insects while monitoring overall plant health

In large-scale CEA facilities, it is very difficult to manually inspect plants for pests and disease. If a breakout occurs - it tends to spread quickly with severe losses! Efficiency comes with scale, but the danger of catastrophic loss increases with scale - more crop at risk in a large facility demands…

Study conducted on white rust on Portulaca

Jean Williams-Woodward and Jeff Cook from the University of Georgia conducted a research on white rust on Portucala. White rust is not a true rust nor a fungal disease. It is…

UV trap prevents pest insects from eating crops

Anyone who googles for a moment on the topic of catching insects with UV light will quickly find the well-known blue insect killers as found in snack bars or butchers. This is also the case with Ardisia grower Dick van den Bos. About four years ago he suddenly suffered the presence of the carnation moth.…

Practices and products to control algae in greenhouses

The University of Connecticut has published a review about the biology of algae and practices and products to control it in greenhouses. Algae is one of the most common…

Australia: Annual forum to discuss top plant disease risk

The Department of Agriculture, Water and the Environment of Australia has hosted the first online forum with industry and federal and state governments to review the progress…

High-tech is helping African and Asian countries win battle against desert locusts

For the unsuspecting farmer, the Desert Locust is a formidable enemy. These wretched pests have a voracious appetite, multiply rapidly and travel up to 150 kilometers a day with the capacity to devour vast swathes of crops and pastureland on the way. In the past year, waves of the insidious insect swept…

Computer learns to recognize viruses in tulip

The Tulip Breaking Virus (TBV) causes a lot of damage to growers every year. Infected tulips must be quickly detected and then cleared to prevent them from affecting other flowers. Detecting by hand is labor-intensive. That is why the Greenhouse Horticulture and Flower Bulbs Business Unit of Wageningen…

Kenya: Protocols for the management of the false codling moth in roses

Recently, protocols for the management of the false codling moth (Thaumatotibia Leucotreta) in roses in Kenya has been published. The objective of the publication is to…

US (WA): Over a billion flowers inspected by CBP ahead of Mother's Day

Mother’s Day is the busiest time of year for flower imports, which can carry pests and diseases that threaten U.S. agriculture and the environment. This year, CBP agriculture…

Inspiration from nature for new 'green crop protection products'

Pesticides are sometimes made using processes familiar from chemistry or biology. Two examples of this can be seen in the decisions of the Ctgb board meeting of 28 April. An…

Taking a more holistic approach to fungus gnat management

Cloudy, gray, damp weather coupled with overly damp soilless media create the perfect environment for fungus gnat outbreaks in greenhouse operations. Insecticides that target the adults can be deployed for a quick knockdown, but a more holistic program utilizing biocontrol agents may work better for…

Using pathogen testing kits for plant disease diagnosis

When plants start dying or showing symptoms of a disease, a quick diagnosis is important to reduce disease spread through a crop. It is best to have the problem accurately diagnosed within a University, state, or private diagnostic laboratory. However, in-house pathogen testing kits can give…

ABC News: Armin Azad

AU: Flower industry calls for more biosecurity investment amid flower import fears

The Australian flower industry's peak body is calling on the federal government to invest more money to protect growers from biosecurity threats. A $371 million biosecurity package was announced yesterday ahead of next week's Budget, which included funding for freight container inspections, the…

US (FL): Genetic testing shows some ‘Touch-Me-Not’ flowers resist deadly disease

A University of Florida scrientist has found that some varieties of the impatiens flower resist the deadly downy mildew disease better than others. Many people love to plant…

U.S. Customs in Louisville sees big increase in prohibited shipments of threatening plants and seeds

U.S. Customs and Border Protection Agriculture Specialists in Louisville have been busy this spring, seeing a large increase in prohibited shipments that could cause a threat…

Study on production of ornamental pyramid pepper with reflective material in different environments

Pepper trees have great ornamental value due to the varied colors of their fruits. Thus, the objective was to evaluate the Pyramid cultivar's production in different cultivation environments using benches with reflective material. The experiment was carried out in two protected environments: a)…

e-gro

Leaf-curling plum aphid: a pest to watch

Aphids are pests that are typically considered and discussed as a group, but in greenhouse production occasionally a species distinguishes itself. The leaf-curling plum aphid, Brachycaudus helichrysi, is one of those. The e-gro team recently encountered it on Bracteantha (strawflower) causing distortion…

Heat induced flower deformation in New Guinea Impatiens

It’s important to review some key production guidelines to ensure you produce the highest quality NGI crop this season. As a day-neutral plant, once lateral branches appear plants will become reproductive and will flower under any day length. Some growers will apply ethephon at 250 ppm (ie. Collate or…

e-gro

How to fight White Mold (Sclerotinia) on Coleus

Coleus plants with white cottony-like growth, stem and leaf rot, and small, hard, black sclerotia were observed. This Alert describes and provides photos of symptoms observed on coleus caused by white mold (Sclerotinia sp.) also referred to as Sclerotinia stem rot or cottony soft rot. To diagnose white…

"Kenyan rose farmers watch out: False Codling Moth could stop export of roses to EU"

The False Coddling Moth (FCM) is posing an increasing threat to the export of roses from Kenya to the Netherlands. Despite efforts of farms, the Kenya Plant Health Inspectorate Services (KEPHIS) and other stakeholders like KFC, FPEAK and FPC, FCM is still being detected on a regular basis. As…

Broad-spectrum Mural fungicide registered for California ornamental growers

Mural fungicide from Syngenta has been registered for use in California, offering greenhouse and nursery growers in the state a powerful new tool to control more than 50…

Study on precision agriculture technologies for fungal disease management of ornamental plants

Ornamental plant production constitutes an important sector of the horticultural industry worldwide and fungal infections, that dramatically affect the aesthetic quality of plants, can cause serious economic and crop losses. The need to reduce the use of pesticides for controlling fungal outbreaks…

"Pay attention to the operating mechanism of products to prevent resistance”

As a grower, you would rather not have any pests in your greenhouse at all. Luckily there are products you can use in case you do have to deal with such a situation. But what if such a pest develops resistance against the product you are using? "For starters, let’s look at what causes resistance. Insects…

"Beetles that pee themselves to death could be tomorrow’s pest control"

Various beetle species have gobbled through grain stores and weakened food production worldwide since ancient times. Now, researchers at the University of Copenhagen have discovered a better way of targeting and eliminating these teeny pests. Instead of using toxic pesticides that damage biodiversity,…

Pythium Root Rot: symptoms and origins

Pythium root rot has been observed in several growing systems this spring. Pythium species tend to have broad host ranges and all greenhouse crops are susceptible to infection under the right circumstances. It is especially troublesome in overwatered or poorly drained growing media, and in hydroponic…

US: What are the options when renewing a pesticide certification?

According to a recent news release from the Michigan Department of Agriculture and Rural Development (MDARD), pesticide applicators can now take their certification exams remotely through the Metro Institute. An emergency rule extended pesticide applicator credential whose license expired Dec. 31, 2019,…

Your levy at work

April pest of the month: Xylella fastidiosa

Xylella fastidiosa is Australia’s number one national priority plant pest. It is a bacterial pathogen that can cause disease on many host plants, most notably Pierce’s disease on grapevine. It is known to infect hundreds of host plant species across nearly 100 families and is recognized as priority pests…

Kenya: Locust outbreak may be coming to an end

The Horn of Africa has been experiencing its worst locust crisis in more than 25 years. In Kenya, the swarms of insects are the worst they've been in 70 years. But things…

Scouting and treatment of gray mold in greenhouse crops

While March 2021 was one of the sunniest on record here in Michigan, cloudy and cool weather inevitably rolls in during April and May. Peak color in the greenhouse coincides with cloudy, damp weather that creates a favorable environment for the fungus Botrytis cinerea, which causes gray mold on many…

ICL launches plant health planner

To help growers plan ahead and optimise plant health on nurseries year-round, ICL has developed a ground-breaking new Plant Health Planner. “A digital web-based tool, it is designed to both simplify and optimise plant health programmes on UK nurseries,” explains ICL Technical Area Sales Manager, Sam…

Researchgate

Haze of glue determines preference of western flower thrips for yellow or blue traps

In a wind tunnel the team compared the color preference for western flower thrips to four types of color plates (clear, white, blue and yellow) applied with two types of glue (diffuse Stikem versus clear D41). Further the results for blue and yellow preference were validated in two greenhouses. In the…

Massachusetts: western flower thrips spotted on geraniums

Damaging populations of Western flower thrips were observed on geraniums this week. The presence of thrips was confirmed by visual observation of the plants, injury symptoms on the plants and adult thrips on yellow sticky cards used for monitoring pests. This detection illustrates the importance of…

US and Canadian scientists intent on battling murder hornets

Scientists in the US and Canada are exploring new ways to fight so-called murder hornets as the giant insects begin establishing nests this spring. Last Wednesday, scientists…

e-gro

Everything about lily basal rot

Easter lily popularity as a greenhouse crop has declined over the years, but there are still thousands of Easter lilies produced in greenhouses each spring. Easter lilies are not an easy crop, and a grower must be very regimented in their production approach so that they will be heavily budded or flowering by the ship date.…

Crop protection with a vacuum cleaner?

People need clean and healthy food and greenhouse-grown vegetables are a very good way of supplying them. This food then has to be protected against a variety of insects that damage either the fruits or the whole plants. Modern growers avoid the use of chemicals and rely on beneficial insects. Micothon…


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